Question

The volume ratio of hydrogen and oxygen gases liberated during electrolysis of water is ______.

Options

• 1 : 2

• 2 : 1

• 1 : 3

• 4 : 1

Answer 1

The volume ratio of hydrogen and oxygen gases liberated during electrolysis of water is 2 : 1.

Explanation:

Electrolysis of water decomposes it into hydrogen and oxygen gases. The ratio of gases produced is based on the chemical equation.

\[\ce{2H2O_{(l)} -> 2H2_{(g)} + O2_{(g)}}\]

2 molecules of hydrogen gas are produced for every 1 molecule of oxygen gas. Hence, the volume ratio of hydrogen to oxygen is 2 : 1.